That would be this one:
Keep in mind that when the movie was made, in 1960, no one had ever seen a film like it. It truly provided the “shock of the new.” With the trailer, Hitchcock starts out ridiculously slow, with a light-hearted theme, using his avuncular presence to set up the audience. Note that nothing important is given away about the plot, now familiar but then virtually unknown.
One can watch this trailer again and again for its own satisfaction. The movie trailer as work of art. Is there even a second place?